//
//  Shape.h
//  外观模式
//
//  Created by flannery on 2018/12/18.
//  Copyright © 2018年 flannery. All rights reserved.
//

#import <Foundation/Foundation.h>

@protocol Shape <NSObject>
-(void)draw;
@end

@interface Rectangle:NSObject<Shape>
@end

@interface Square:NSObject<Shape>
@end

@interface Circle:NSObject<Shape>
@end
